Paper-cutting machine.



PATENTBD SEPT. 24, 1907.

C. SBYBOLD. PAPER CUTTING MACHINE.

APPLIGATION I'ILED NOT. 6, 1905.

2 SHEETS-SHEET 1.

2 SHEBTS-SHBET 2.

. PATENTED SEPT. 24, 1907.

0. SEYBOLD. PAPER GUTTING MAGHINE. APPLICATION PILD Nov. e, 1905.

PATENT OFFICE.

CHARLES SEYBOLD, OF DAYTON, OHIO.

PAPER-CUTTING MACHINE.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed November 6, 1905. Serial No. 286.133.

To all whom it may concm:

Be it known that I, CHARLEs SEYBOLD, a citizen of the United States, residing in Dayton, county oi Montgomery, and State of Ohio, have invented certain new and useful Improvements in Paper-Outting Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to automatic paper cutting machines, provided with clamps frictionally coupled to the driving mechanism for the kniie, so that the clamp will operate automatically but in which the clamp is also adapted to be operated independently by a foot treadle. In such machines it is usual to divide the clamp into two parts, the lower portion being carried down by the upper portion, which is alone coupled to the driving mechanism. Then by connecting the lower portion of the clamp with a foot treadle, this portion may be operated independently oi the power clamp. With such constructions, it is usual to pro vide weights or springs to return the foot operated portion of the clamp to its normal position in contact with the power connected portion, and my present invention is particularly directed to improvements in the Construction and operation of this foot treadle portion of the clamp, and the mechanism for returning same to normal position, as will be hereinafter particularly pointed out and claimed.

In the drawings Figure l is a side elevation oi my paper cutter. Fig. 2 is a sectional view taken just inside the side standard. Fig. 3 is a rear elevation of the upper portion of the machine, showing the clamps. Fig. 4 is a cross section of same taken on the lines 4-4 of Fig. 3. Fig. 5 is a similar cross section with the treadle clamp lowered.

As my present invention relates particularly to the treadle clamp mechanism, a rather brief description of the general Construction of the paper cutter is all that will be required. v

1-1 are the side standards, and 2 the table top, forming a massive framework for supporting the operating parts. 3 is the kniie head to which is bolted the cutting knife 4. This cutting head is driven by the pulling bars 5-5, which are connected at their lower ends with a slotted cross bar 6, extending across the machine from side to side. This pulling bar is provided with diagonal Slots, so as to give the kniie head and knfe a shearing cutting, and the bar is actuated by the crank 7 on the crank shaft 8 journaled in the frame, this crank shalt carrying the beveled gear 9, actuated by the pinion 10 on the driving shaft 11 of the machine. The power clamp is made up of the clamp head 12, and the clamp bar 13. The clamp head 12 is provided with the draw bars 14, carrying the racks 15 at their lower ends engaged by the pinion 16, provided with the arm 17, pivoted on the lower end of the coupling box 18, which is clamped around the connecting rod 19, so as to frictionally couple these parts together. The connecting rod 19 is pivoted to the crank arm 20 on the shalt 21, upon which is secured the gear 22 driven by a pinion 23 on the shalt 24 coupled by the gear 25 with a pinion on the driving shaft 11 so that with the normal operation of the machine, the clamp will be carried down with the knife to clamp and hold the paper bundles, the clamping power being regulated by the irictional hold between the coupling box 18 and the connecting rod 19. All the above described parts of the paper cutting machine are old, and form no part oi the present invention, which invention relates to the means for Operating the clamp member by a foot treadle, and for returning it to its normal position.

The clamp bar 13 is connected at either end by the connecting' rods 26 with the crank arms 27 on either end of the shalt' 28, journaled in the framework and this shaft carries the pulley 29 to which is attached the cord or chain 30 running over the idler pulley 31 to the segment pulley 32 on the treadle bar 33 journaled in the lower portion of the framework, and to which is Secured the foot treadle 34 preferably running across the machine, so that it may be actuated from any position. As soon as the foot treadle is depressed, it will be evident from this Construction that the clamp bar 13 will be drawn down to compress the paper independently of the power mechanism.

In order to return the clamp to its normal position when the foot treadle is released, I provide as follows: Mounted in suitable bearings 35-35 on the rear face of the clamp head 12 is the shaft 36. Secured on this shaft just within the bearings are the sleeves 37-37, provided with segment castings 38-38, to which are secured chains 39-39, which run over rollers 40-40, through an opening in the fiange of the clamp head, and are connected to the clamp bar 13. Mounted between the sleeves 37-37 is a coiled spring 41, one end of which, 42, bears against the face of the clamp head, while the other end is secured to the split collar 43, mounted on the shaft 36, so that by rotating the collar any desired torsional tension can be given the spring, and in order to adjust this tension, holes 44 are provided in the collar for turning same It will be evident from this construction that the segment bar 13 will be lowered by the foot treadle against the torsion of the spring 41, and that as soon as the foot treadle is released, the clamp will at once be returned to its normal position in contact with the clamp head.

Heretofore when springs have been employed to return the treadle clamp to its normal position, it has been customary to secure such springs to the clamp shait through which the clamp is operated by the power Inechanism, and as a result of this, the springs were always placed under tension when the cutter was operated by power, and, therefore, there has been much greater wear on the springs, and they are much more liable to break. In addition to this, inasmuch as the 'clamp shafts are located within the rame below the operating table, these springs when in need of attention or repair, were in a very inaccessible position. In my present invention, the tension spring is mounted on a separate shaft on the clamp head above the table in a very accessible position, where the tension can be Very readily altered to suit the requirements, and where When the power mechanism is used to operate the clamp, the tension spring is not acted upon at allfl Where weights are employed to return the treadle clamp bar, the movement is entirely too fast and the clamp bar is apt to rebound from the clanp head, and there is no convenient way of regulating the operation.

The trsion spring arrangement above described and located within easy access mounted on the clanp head embodies a most satisfactory Construction for returning the treadle clamp to normal position. The tension of the spring can be easily regulated to return the clamp Without jar, and should any of the parts needrepair very convenient access may be had.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a paper cutter, a elamp, comprising a clamp head, and a separate paper-compressing clamp bar, with means for actuating both said ciamp head and clamp bar simuL taneously by a power driven mechanism, with a foot &66,739

treadle for Operating the clamp bar independently of the clamp head, a shaft journaled on the clamp head paraiiel with the clamp bar, sleeves Secured to the shaft, with flexible connection therefor to the clamp bar, and a coiled spring mounted on said shaft, one end hearing against the clamp head, and the other end Secured to said shaft, whereby when the shaft is rotated under the operation of the foot treadle, torsional tension will be exerted on the clanp bar to return it to its normal position when the foot treadle is released, and when the clamp head and clamp bar^are actuated by the power driven mechanism, said coiled spring will not be affected.

2. In a paper cutter, a clamp, comprising a clamp head and a separate paper compressing clamp bar, with means for actuating both said clanp head and clanp bar simultaneously by a power driven mechanism, with a foot treadle for Operating the clamp bar independently of the clamp head, a shaft journaled on the clamp head parallel with the ciamp bar, slecves secured to the shaft, withflexihle connection therefor to the clamp har, and a coiled spring mounted on said shaft, one end hearing against the clamp head, a rotatable adjustable collar secured to said shatt to which the other end of said spring is attached, whereby the tension of' said spring may be adjusted, and when the shaft'is rotated under the operation of the foot treadle, desired torsional tension will be exerted on the ciamp bar to return it to its normal position when the foot treadle is released, and when the clamp head and clamp bar are actuated by the power driven mechanism, said coilcd spring will not be affected.

CHARLES SEYBOLD.

Witnesses SOUTHARD P. WARNER, RUDOLPH FRICKE. 

